Heating apparatus



Jan. 30, 1934. P. G. BRANDT HEATING APPARATUS Filed July 23, 1951 2 Sheets-Sheet l gmwm Tau? GTBrandi Jan.- 30, 1934. p, BRAND-r 1,945,418

HEATING APPARATUS Filed July 23, 193 2 Sheets-Sheet 2 .Brandi' Patented Jan. 30, 1934 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a heating apparatus particularly adapted to burn gas, and has for its primary object to provide, in a manner as hereinafter set forth, a heating apparatus wherein the exhaust gases are employed for pre-heating the heating fluid during the return of the latter to the heating chamber, and wherein a maximum amount of heat is extracted from the exhaust gases before the same are discharged.

A further object of the invention is to provide a heating apparatus of the character aforesaid which is economical to manufacture, install and operate, and which has superior lasting qualities.

With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts as hereinafter more particularly described, and as illustrated in the accompanying drawings wherein is shown an embodiment of the invention, but it is to be understood that the description and drawings are to be considered as illustrative rather than limitative.

In the accompanying drawings wherein like numerals are employed to designate like parts throughout the several views:

Figure 1 is a longitudinal vertical section through a heating apparatus in accordance with this invention.

Figure 2 is an enlarged section taken on the line 2-2 of Figure 1.

Figure 3 is an enlarged section taken on the line 3-3 of Figure 1.

Figure 4 is a front elevation of the apparatus.

Figure 5 is a view similar to Figure 3 showing a modified form of apparatus adapted to employ hot water as the heating medium.

Figure 6 is a diagrammatic view showing a circuit for controlling the fuel supply valve.

Figure 7 is a diagrammatic view showing a modified form of circuit for controlling the fuel supply valve.

Figure 8 is a section taken on the line 8-8 of Figure 6.

Figure 9 is a section taken on the line 9-9 of Figure '7.

A heating apparatus in accordance with this invention consists primarily of a main unit indicated generally at 1, and a secondary unit indicated generally at 2. The units 1 and 2 are of elongated construction, preferably cylindrical.

The main unit 1 comprises a horizontally disposed cylindrical body part 1 having front and rear end closures 1" and 1 respectively. Arranged within the body part 1 at a point between its vertical median and end closure 1", as well as being secured to the inner face of body part 1' is a partition 3 which in connection with end closure 1" and a portion of body part 1' provides a steam generating chamber 4. Positioned within body part 1 and secured to end closure 1" and partition 3 is a cylindrical member 4 which provides a combustion chamber 5. The member 4 is of less outer diameter than the inner diameter of body part 1 and is spaced from the latter. That portion of the body part 1' between end closure 1" and partition 3 in connection with member 4', end closure 1" and partition 3 provides a steam generating space 6 which entirely surrounds the combustion chamber 5. The end closure 1" is provided with a door 5' for access to chamber 5. A burner '7 is arranged within chamber 5 and which is connected to a fuel supply line 8 provided with a valve 9. Opening into the bottom of space 6 is a water supply line 10.

Extending longitudinally of the steam generating chamber 4 are a plurality of heat conducting tubes 11 preferably formed of copper and which open at their forward ends through the partition 3 into the chamber 5. The rear ends of the tubes 11 open through'the closure 1" into a header 12 attached to the rear end of body part 1'. Leading upwardly from the header 12 is a heat conducting flue 13 which opens into a rear header 14 arranged within the rear end of the body part 2' of the secondary unit 2.

The body part 2' is cylindrical, arranged in superposed parallel spaced relation with respect to body part 1' and of less length and of less diameter than that of the latter. The body part 2' is provided with front and rear end closures 2", 2" respectively. The body part 2' provides a pre-heating chamber 14' for the water from the radiators resulting from the condensation of steam. Opening at their rear ends into the header 14 and disposed lengthwise of chamber 14 are a plurality of heat conducting flues 15 which at their forward ends open into a header 16 positioned in chamber 14' adjacent end closure 2". The heating units pass from the header 1'2, tubes 13 and header 14 into the tubes 15 and from the latter into header 16. The heating units are discharged from header 16 by a pipe 16' extended from header 16, through body part2 and opening into a flue or chimney 1'7.

Opening into the rear end of the top of the steam generating space 6 through the partition 3, adjacent the top of the latter, is a water supply pipe 18 which extends at a downward and inward inclination into the chamber 4. Any steam within pipe 18 will pass out through a series of outlets 19 provided in the pipe and such outlets prevent siphonage. Leading from the top of the chamber 4 is a steam conducting pipe 20 which is adapted for connection with the usual radiators, not shown, and which may be of any well known construction. Leading from the top of the space 6 is a steam conducting pipe 21 which may be connected with the pipe 20 if desired, or which may be connected with an independent set of radiators. Additional pipe 20 level in chamber 4 will be below that of the,

water in space 6. Also adapted for connection with the radiators, not shown, is a return pipe 23 for the water resulting from the condensation of steam and which discharges into the secondary unit 2 wherein the water is preheated by its con tact with the tubes during its passage through the unit. Adjacent the forward end of the unit 2 the .pre heated water is discharged through a pipe j24fand returned to the lower portion of the steam generating space 6 adjacent the point of communication of the water supply line 10 with said space. The pipe 24 is arranged exteriorly of the forward ends of the units 1, 2. The pipe 24 opens into the top of chamber 14 between the end closure 2 and theheader 16. The pipe 23 opens into the chamber 14= forwardly of and in close proximity to header 14. i v

In the'us'e of the apparatus, the valve 9 is controlled by means of an electric circuit illustrated diagrammatically in Figure 6 and connected with electrical supply lines 25. The circuit includes a thermostat shownconventionally at 26 and an electromagnet 27. The thermostat 26 may belocated in any remote position desired, while the electromagnet 2'7 is located in a position for directly controlling the valve 9. One terminal of the thermostat 26 is connected by means of a r conductor 28 with .a contact 29 extending through the faceplate 30 of the gauge 22. One terminal of the electromagnet27 is connected by means of a conductor 31 with a similar contact 32 extending through the'face plate 30 in spaced relation to the contact 29. Having one end connected with the contact 29'is an angular or curved resilient-bar 33 which has its opposite end fixedly connected with and insulated from the gauge 22 inwardly cf the face plate30; A central portion of the bar 33 is in alignment with the contact 32, and is normally maintained in engagement therewith owingto the resiliency of the bar. The bar 33 is located withrespect to the pointer 34 of the gauge in such a'manner that the pointer will extend across the bar between the latter and the face plate 30. When the bar is in engagement with the contact 32, thecircuit between the thermostat 26 and electromagnet 27 is closed for operating the valve 9. If the steam generated within the jacket 6 reaches the required pressure in aidvanceof the operation of the thermostat to break the circuit, the bar '33 will he forced out of engagement withthe contact 32by the movement of the pointer 34 to indicatejthe steam apressure, thereby breaking the circuit and pre venting a waste of fuel which would otherwise occur duringthe raising of the room temperature suiiiciently to operate the thermostat 26.

ing its ends securedto and insulated from the g uge 22 inwardly of the face plate 30 is an angular or curved resilient bar 40 having a central portion thereof in alignment with the contact 39. The inherent resiliency of the bar 40 normally maintains the same in engagement with the contact 39 to complete the circuit between the thermostat 26 and electromagnet 27. If the steam is raised to the desired pressure prior to the operation of the thermostat 26 to break the circuit, the movement of the pointer 37 to indicate the pressure forces the bar 40 out of engagement with the ccntact 39 to break the circuit. If desired the thermostat may be eliminated from either of the circuits, in which event the electromagnet 27 and one of the contacts of the gauge 22 will be directly connected with the supplyli If it is desired to employ hot water as a heating fluid instead of steam, the partition between the chamber fl and the combustion chamber is formed adjacent its top with a series of spaced heating apparatus in accordance with this invention will be readily apparent, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the size, shape and arrangement of parts may be resorted to, so long as such changes fall within the scope of the invention as defined in the appended claim.

lVhat. I claim is: r I

In a heating apparatus 'of that type including a heated condensate receiver for the reception of and for heating the water of condensation from a'point of steam use, the combination of 'a horizontally disposed cylinder closed at its end, means within the front end portion of and coacting with the cylinder to provide a horizontally disposed combustion chamber, an, annular steam generating space completely encompassing said chamber circumferentially of the latter and a steam generating chamber extending rearwardly fromthe inner end of said combustion chamber and space, heat conducting means extending through and for heating the steamgeneratingchamber, said conducting means communicating with and extending from the rear end of the combustion chamber, a steam conducting pipe leading from the top of said space and adapted to supply steam to a point of use for the latter,

a steam conducting pipe leading from the top of the generating chamber and adapted to supply steam to apoint of use for the latter, a pipe for supplying heated water of condensation to the bottom of said space, a water supply line opening lie into the bottom of said space, and a downwardly inclined perforated water supply pipe leading from the upper portion of the space and opening into said heat generating chamber said water supply pipe having its upper end arranged belowvthe intake end of the steam conducting pipe leading from said space.

PAUL G. BRANDT. 

